JPH0635752Y2 - Complex operation lever structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is configured such that an operating lever can be swingably operated in a cross direction around two axial centers that are orthogonal to each other. A composite operation lever comprising a first driven device operated in association with a swing operation and a second driven device operated in association with a swing operation of the operation lever in a direction orthogonal to the one direction. Regarding the structure.

[Conventional technology]

Conventionally, in a combine, which is one of the work vehicles, for example, as disclosed in Japanese Utility Model Laid-Open No. 62-136137,
The operating lever can be swung in one direction (front-back direction) to move the mowing section up and down, and the operating lever can be swung in the direction (horizontal direction) orthogonal to the side direction (left-right direction). Some are linked so that the turning operation can be performed by the clutch brake.

In the disclosed structure, the inner wire of the wire is connected to the operation lever, the outer wire of the wire is connected to the fixed side of the machine body, and the swinging of the operation lever in the left-right direction causes the inner wire of the wire to move. The structure is such that the side clutch brake is operated by converting to pulling operation.

[Problems to be solved by the device]

In the case of such an operating lever, the side clutch brake is not operated by swinging the operating lever in the left / right direction while swinging the operating lever in the front / rear direction to raise / lower the reaper. Should not be. However, with the above-described structure, when the operation lever is rocked back and forth, the outer wire of the wire connected to the fixed side of the machine is in a fixed state, while the inner wire of the wire is in a fixed state. Although the arm portion of the operation lever to which the wire is connected is small, it is displaced with respect to the outer wire of the wire. In other words, the inner wire is slightly pulled with respect to the outer wire, which may cause the side clutch brake to be operated and the turning operation by the side clutch brake to be unexpectedly performed.

Here, the present invention has been made by paying attention to the above-mentioned problem, and when the operation lever is operated to swing in one direction, the operation lever is swung in a direction orthogonal to the one direction. It is intended to prevent a situation in which a driven device to be operated is accidentally operated.

[Means for Solving the Problems]

The characteristic configuration of the present invention is that the operating lever configured to be swingable in a cross direction around two mutually perpendicular axes is operated by a first driven member which is operated in accordance with the swinging operation of the operating lever in one direction. In a composite operation lever structure in which a device and a second driven device that is operated in accordance with a swinging operation of the operation lever in a direction orthogonal to the one direction are linked to each other, A wire connected to the first driven device, which is composed of a shaft center of a second support shaft to which the operation lever is swingably mounted and a shaft center of a first support shaft to which the second support shaft is mounted. An inner wire is connected to the operation lever, an outer wire of this wire is fixed to the first support shaft, and a swing operation of the operation lever around a second shaft core that is the shaft center of the second support shaft. Causes the first driven device to cut forward and backward through the wire. The second driven device is switched between the forward and reverse directions via the first support shaft by the swinging operation of the operation lever around the first shaft center, which is the shaft center of the first support shaft, so as to be operated. They are linked so that they can be operated, and their actions and effects are as follows.

[Action]

According to the characteristic configuration of the present invention, when the operation lever is swung about the first axis which is the axis of the first spindle, the first spindle is naturally rotated around the first axis. As a result, the second driven device is switched between the forward and reverse directions. Also, along with the operation, the inner wire of the wire connected to the operation lever swings around the first axis together with the operation lever, but the outer wire of the wire also moves around the first axis together with the operation lever. Since the inner wire is unexpectedly pulled with respect to the outer wire of the wire in accordance with the swinging operation of the operation lever around the first axis, the first driven device is switched between forward and reverse. It is never operated. Then, when the operation lever is oscillated around the second axis which is the axis of the second spindle orthogonal to the first axis which is the axis of the first spindle, the inner wire of the wire is pulled. As a result, only the forward / reverse switching operation of the first driven device is performed, and as a matter of course, the second lever of the operation lever is operated.
There is no possibility that the first support shaft is rotated around the first axis and the second driven device is switched between the forward and reverse directions due to the swing operation around the axis.

[Effect of device]

As described above, one operating lever that can be pivotally moved in the cross direction around two mutually orthogonal axes is linked using wires so that two sets of driven devices can be switched between forward and reverse directions. In this case, it is possible to prevent a situation in which, while operating one driven device by swinging the operating lever in one direction, the other driven device is unexpectedly operated. In other words, it has become possible to improve safety.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the structure around the operation lever (1) in the combine, and the first support shaft (rotatably supported around the left and right axis (P ₁ ) which is one axis in the aircraft control section ( 2
A support bracket (3) is fixed to A), and the support bracket (3) is supported so as to include another front-rear axis (P ₂ ) that is orthogonal to the left-right axis (P ₁ ). Further, the operation lever (1) is attached to the second support shaft (2B) so as to be swingable around the front-rear axis core (P ₂ ), whereby the operation lever (1) is attached to the front, rear, left and right axes. Wick (P ₁ ),
(P ₂ ) It is possible to swing in a cross direction around it.

Of the two front, rear, left and right axis cores (P ₁ ) and (P ₂ ) which are orthogonal to each other, the support bracket (3) for fixing the left and right axis cores (P ₁ ) to the second support shaft (2B) is fixed. The first support shaft (2A) is composed of the first shaft core, and the front and rear shaft core (P ₂ ) is the second support shaft (2B) to which the operation lever (1) is attached. It is composed of two axes.

The operating lever (1) includes a turning device (7) as a first driven device which is operated by swinging the operating lever (1) in the left-right direction (B), and a front-back direction of the operating lever (1). The lifting device (4) as the second driven device operated by the swinging operation of (A) is linked.

Next, the lifting device (4) for moving the harvesting part (36) of the combine shown in FIG. 10 up and down by hydraulic pressure and the operation lever (1) are linked, and the side clutch brake (5R) shown in FIG. The linking structure of the turning device (7) for hydraulically operating (5L) and the operating lever (1) will be described in detail. As shown in FIGS. 1, 5, and 10, the end portion of the first support shaft (2A). Arm (2a) fixed to the operation part (4) of the lifting device (4)
a) is interlocked with each other via a link rod (6), and the operating lever (1) is rocked around the left and right axial center (P ₁ ) along the front-rear direction (A), whereby (36)
It is possible to perform the lifting operation of.

And hydraulically operated side clutch brake (5R),
(5L) Turning device for supplying and discharging hydraulic oil (7)
Is connected to the lifting device (4) to form a unit, and the push full wire (8) connected to the turning device (7) extends to the operation lever (1). As shown in FIGS. 1 and 7, in the push full wire (8), the inner wire (8a) is connected to the operation arm (37) fixed to the operation lever (1), and the outer wire is (8b) is fixed to the first support shaft (2A). This allows the inner wire (8a) of the push full wire (8) to be pushed / pulled even if the operation lever (1) is swung in the front-rear direction (A) (the raising / lowering operation of the reaper (36)). Since it is not operated, the turning device (7) is not accidentally operated.

Further, the turning device (7) will be described in detail. As shown in FIGS. 1 and 5, the side clutch brake (5
A swivel device (7) is composed of a spool type control valve (9) for supplying / discharging hydraulic fluid to / from the R) and (5L) operation cylinders (11) and a variable relief valve (10). There is. The inner wire (8a) of the push full wire (8) is connected to the operation arm (17) that operates the control valve (9), and the outer wire (8b) is connected to the operation arm (18) of the variable relief valve (10). ) Is linked to.

On the other hand, side clutch brakes (5R), (5L)
As shown in Figs. 5 and 10, the structure of Fig. 10 is such that the shift member (13) is slidably fitted to the drive shafts (12) of the left and right crawler traveling devices (38) by a spline structure. The state shown in FIG. 5 is a state in which both shift members (13) are engaged with the drive gear (14) and power is transmitted to the left and right drive shafts (12). Then, the shift member (13) is slid by the operation cylinder (11) via the swingable operation arm (15) to be separated from the drive gear (14), whereby the one crawler traveling device (38). The transmission of power to is cut off and a gentle turn is made. Then, when the shift member (13) is further slid, the multi-plate side brake (16) is pressed and operated, so that the crawler traveling device (38) on one side is braked so that turning can be performed.

With the above structure, for example, the operation lever (1) is moved in the left-right direction (B) to the right side clutch disengagement position (right clutch
When turned down to OFF), the inner wire (8a) is pulled to switch the control valve (9) as shown in FIG. 2, and the operating cylinder (5R) of the right side clutch brake (5R) is switched. The hydraulic oil is supplied to 11), and the right shift member (13) shown in FIG. 5 slides to the right of the drawing and moves away from the drive gear (14). In this case, hydraulic oil escapes from the variable relief valve (10) at the neutral position before the right shift member (13) presses the side brake (16), and the right shift member (13) stops at the neutral position. Of. This is a gentle turning state in which the transmission of power to the one crawler traveling device (38) is cut off.

In the right side clutch disengaged state as shown in FIG. 2, the spool (not shown) of the control valve (9) reaches the stroke end and cannot move any further. Therefore, when the operation lever (1) is further tilted to the right side brake ON position (right brake ON) from the state shown in FIG. 2 and the inner wire (8a) is pulled, the outer wire (8) is turned on the turning device (7) side. 8b) moves to the left on the paper. As a result, the relief pressure of the variable relief valve (10) is increased via the operation arm (18), the left operation cylinder (11) shown in FIG. 5 is further extended from the neutral position, and the right shift is made. The member (13) presses and operates the right side brake (16). This is a solid turning state in which one crawler traveling device (38) is braked.

The above-mentioned movement is the same at the left side clutch disengaged position (left clutch OFF) and the left side brake engaged position (left brake ON) of the operation lever (1). In other words, move the operating lever (1) to the left side clutch disengaged position (left clutch
When it is turned OFF, only the operation arm (17) of the control valve (9) is oscillated to the left in the drawing from the state shown in FIG. When it is operated to the on position (left brake ON), the operation arm (18) of the variable relief valve (10) is rocked to the right side of the drawing, and pivoting can be performed.

As shown in FIG. 3, the variable relief valve (10) has a structure in which a spring (10c) is mounted between a ball-shaped poppet (10a) and a slide type support base (10b). . Then, half of the support shaft (19) of the operation arm (18) is cut out, and the support base (10b) is attached to the cutout surface (19a).
Is in contact. With the above structure, the operation arm (18)
Is swung to the left or right of the drawing, that is, the operation lever (1) is moved to the left side brake on position (left brake O
N) or even if it is operated to the right side brake ON position (right brake ON), the support base (10b) is pushed to the left side of the paper and the relief pressure is increased. In addition, the spring (10
In d), the support base (10b) is biased to the right side of the drawing.

Further, the push full wire (8) has a connecting structure of the outer wire (8b) and the operation arm (18).
As shown in FIGS. 4 and 5, a support bracket (20) for the outer wire (8b) is rotatably supported around the horizontal axis (P ₃ ) of the operation arm (18), and the support bracket is also supported. A leaf spring (21) is attached so as to sandwich the upper part of (20) so that the support bracket (20) does not rotate extremely.

Then, as shown in FIGS. 1 and 2, the control valve (9)
The actuator (22) attached to the operation arm (17) for the control valve (9) is based on a signal from the control device (not shown) when the machine automatically travels along the planted culm. Is operated for switching. In this case, the inner wire (8a) of the push full wire (8) is connected to the operation arm (17) through the elongated hole (17a),
Slot longer than the working stroke of the actuator (22) (17
a) is set to a short one. As a result, when the control valve (9) is switched by the actuator (22), the operation lever (1) is slightly rocked right and left via the push full wire (8). The operator can visually confirm the automatic traveling state by the operation lever (1). Further, the actuator (22) is in a freely moving state during the manual operation by the operation lever (1).

Next, the structure for urging the operation lever (1) to the center neutral position (N) in the left-right direction (B) will be described in detail.
As shown in FIG. 6 (a) and FIG. 7, the first swinging motion which is independent of the operation lever (1) and can swing independently around the front-rear axis (P ₂ ) of the support bracket (3). Arm (23) and second
A swing arm (24) is attached. Then, the first pin (25) fixed to the operation arm (37) of the operation lever (1) is inserted between the first and second swing arms (23) and (24), and the first pin ( A spring (26) is laid across the first and second swing arms (23) and (24) so as to pinch the (25). On the other hand, the operation arm (37) is provided with the check hole (27) and the support bracket (3)
A second pin (28) fixed to the check hole (27) is inserted into the check hole (27), and is further inserted between the first and second swing arms (23) and (24).

With the above structure, when the operating lever (1) is tilted to the right side clutch disengaged position (right clutch OFF) and right side brake engaged position (right brake ON), for example, the second pin (28) Thus, with the second swing arm (24) stopped, the first pin (25) of the operation arm (37) swings the first swing arm (23) to the left in the drawing. As a result, the urging force of the spring (26) tends to return the operating lever (1) to the central neutral position (N). Conversely, when the operation lever (1) is tilted to the left side clutch disengaged position (left clutch OFF) and left side brake engaged position (left brake ON), the first swing arm (23)
The second swing arm (24) is oscillated rightward on the paper surface in a state where is stopped, and the operation lever (1) tends to return to the central neutral position (N).

Then, when the operation lever (1) is tilted to the left side brake ON position (left brake ON) or the right side brake ON position (right brake ON), the second pin (28) is turned on as shown in FIG. 6 (B). ) Contacts the inner surface of the check hole (27), and the operating lever (1) cannot be operated by tilting it further.

Further, as shown in FIGS. 7 and 6 (a) and (b), the support bracket (3) is a contact type for detecting that the operation lever (1) is in the vicinity of the neutral position (N). The sensor (29) is fixed. And this sensor (2
The automatic travel is performed by the actuator (22) only while the operation lever (1) is detected to be in the vicinity of the neutral position (N) by 9), and the operation lever ( If 1) is manually operated, this will be prioritized and the automatic running will be suspended.

Next, the structure of the lever guide (30) for guiding the operating lever (1) along the front-rear direction (A) and the left-right direction (B) will be described in detail. As shown in FIG. 9 and FIG. Is equipped with 4 sets of 1/4 circular lever guides (30),
This lever guide (30) is a pair of upper and lower support plates (31),
It is sandwiched by (32) and is slidably supported between the support plates (31) and (32). Also, the convex portion (32a) provided on the upper surface of the support plate (32) contacts the side portion of the lever guide (30) so that the lever guide (30) does not enter further inward. To do.

A C-shaped return spring (33) made of elastic wire such as a piano wire is attached so as to surround the outside of each lever guide (30), and an opening (33a) of the return spring (33) is provided. Lever guide (30) and lever guide (30)
The locking portion (34) fixed to the lower support plate (32) is arranged so as to be located between the return spring (33) and the opening portion (33).
a) It is getting in.

With the above structure, the operation lever (1) is guided in the front-rear direction (A) and the left-right direction (B) as shown in FIG. 1 and FIG. 8 (a). As shown in FIG. 3, one of the lever guides (30) is pushed away by the operation lever (1) and is operated in an oblique direction between the front-rear direction (A) and the left-right direction (B), so that the mowing section (36) is removed. It is possible to perform the lifting and lowering operations and the turning operation at the same time.
Then, when the operation lever (1) is returned to the neutral position (N),
The lever guide (30) is returned to a predetermined position by the urging force of the return spring (33), and the return spring (33) is operated by the operation lever (1).
Even if you try to rotate it around, the locking part (34) and the opening part (33
The rotation is stopped by the contact action with a). Since the return spring (33) is made of metal, it can withstand many years of use rather than making the lever guide (30) of a rubber plate.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 shows an embodiment of a composite operating lever structure according to the present invention. FIG. 1 is a view showing the structure around the operating lever base and a state in which the operating lever is connected to a lifting device and a turning device, and FIG. FIG. 4 is a view showing a state of linkage with a turning device when operated to a right side clutch disengaged position, and FIG. 3 is a front view showing a structure of a variable relief valve and a connection structure between an operation arm of the variable relief valve and an outer wire; The figure is a side view showing the connecting structure between the operating arm and the outer wire of the variable relief valve. Fig. 5 is a view showing the structure of the left and right side clutch brakes and the hydraulic circuit for the side clutch brake. The front view of the vicinity of the operation lever base when operated to the neutral position, Fig. 6 (b) is the front view of the vicinity of the operation lever base when the operation lever is operated to the right side brake on position, and Fig. 7 is the operation Side view of the vicinity of the bar base, 8 (b) are cross-sectional plan view of the vicinity of the lever guide of the operating lever,
FIG. 8 (B) is a cross-sectional plan view of the vicinity of the lever guide showing a state where the operation lever is operated in an oblique direction from the state shown in FIG. 8 (A), and FIG. 9 is an exploded perspective view of the vicinity of the lever guide.
Figure 10 is a side view of the first half of the combine. (1) …… Operating lever, (2A) …… First spindle, (2B)…
… Second spindle, (4) …… Second driven device, (7) …… First
Driven device, (8) ... Wire, (8a) ... Inner wire, (8b) ... Outer wire, (P ₁ ) ... 1st axis core, (P
₂ ) …… Second axis core.

Claims (1)

[Scope of utility model registration request] 1. An operating lever (1) configured to be swingable in a cross direction around _two shaft cores (P ₁ ) and (P ₂ ) orthogonal to each other is provided in one direction of the operating lever (1). A first driven device (7) operated in accordance with a swinging operation of the second lever, and a second driven device (4) operated in accordance with a swinging operation of the operation lever (1) in a direction orthogonal to the one direction. A second operation shaft in which the operation lever (1) is swingably attached to the two operation shaft cores (P ₁ ) and (P ₂ ) orthogonal to each other. (2B) shaft core and the first support shaft (2) to which the second support shaft (2B) is attached.
And the inner wire (8a) of the wire (8) linked to the first driven device (7) is connected to the operation lever (1).
An outer wire (8b) of this wire (8) is fixed to the first support shaft (2A), and the second support shaft (2B) around the second shaft core (P ₂ ) is fixed. The first driven device (7) is switched between forward and reverse through the wire (8) by swinging the operating lever (1), and at the axis of the first support shaft (2A). By swinging the operation lever ( ₁ ) around a certain first axis (P ₁ ), the second driven device (4) is switched between the forward and reverse directions via the first support shaft (2A). Combined operation lever structure linked to.